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If you’re looking for natural performance, easy layering and a whole lot of comfort, then look no further as the Altitude Zip is one seriously good thermal layer. Whether you’re wearing it as a base/first layer, on its own, 3/4 zip up or down, it’s perfect for anyone who’s on the go, especially if you’re expecting to hit a range of temperatures while you’re at it. The high collar, when zipped up, also offers an extra level of warmth beyond the Crew Neck version of this top.

Made with our flagship Enigma MicroMerino® fabric – 96% superfine Australian Merino and 4% Elastane, the Altitude Zip features all of the performance you know and love in our MicroMerino® garments, plus an easy four way stretch for freedom of movement when you’re on the go. Oh, and did we mention the incredibly soft next to skin feel?

With flat lock seams, heat transferred tags and raglan sleeves to help prevent chafing, plus thumb loops and a drop back hem for easy layering, the Altitude Zip is the perfect combination of performance, warmth and comfort.

Designed to be worn as a snug ‘contact fit’ layer, we’d recommend going up a size if you’re looking for a more casual fit.

Key Features:

Made with the flagship Enigma MicroMerino® - 96% superfine Australian Merino and 4% Elastane - for an easy four way stretch and freedom of movement.

3/4 zip to maximize temperature regulation – Zip down when the temperature rises and zip up when it drops.

Drop back hem designed for tucking into your outer layers, or sitting over bottom layers, with no exposed cold spots when you're on the go.

The combination of merino wool and 4% elastin in the 'Enigma' fabric ensure perfect body contact, eliminates excessive bulk, and a 4-way stretch allowing your limbs to move freely as the fabric does not inhibit your range of motion.

Antimicrobial - Moisture absorption properties reduce the tendencies for a build-up of odour.

Luxuriously soft next to skin

Breathable and temperature regulating

Ultra-comfortable warmth

Maximum warmth, minimal weight

Quick drying

All ioMerino fabrics are fully machine-washable.

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Love merino!

Review by Rifraf on 10/13/17

Great base layer and even better on sale! I got a size small (I am normally 8-10 top) which fits snugly - wouldn't want it any tighter but feels lovely against skin.

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Good for travelling

Review by Jane on 6/27/17

Recently went to Nepal, all the clothing purchased by myself and others were a hit. limited washing opportunities are paramount. The clothes delivered on every level on our trek to Everest Base Camp. The trip was definitely worth it.